Basics of the Signal Path

The input to the Boss GE-7 Graphic EQ has a buffer which is active at all times. There is a slight emphasis around 2 kHz to help the guitar sound stand out. Immediately after the buffer is the amplifier for the level control. It’s a differential type with only one source voltage split with the level’s sliding potentiometer. This slider will either boost or cut the whole signal when it is moved from the zero line. From here, the signal is split; one path goes to the EQ section and one part goes to the positive input of another differential amp. The EQ section feeds the negative input of the differential amp. (more…)